- xpath.c: bug fixes found from XSLT
- tree.c: preserve node->name special values when copying nodes.
- parserInternals.[ch] parser.[ch] SAX.c : added a mode where
  external subset are fetched when available but without full
  validation. Added xmlLoadExtDtdDefaultValue, need a function.
- HTMLtree.c: add support for xmlStringTextNoenc for XSLt HTML
  output with encoding disabled.
Daniel